TY  - BOOK
TI  - A Global Warning?: After 650 million years of climate change, is global warming simply a naturally occuring phenomenom, or the result of human activity? 
SN  - 1422906507
U1  - 551.5 
PY  - 2008///
CY  - New York : 
PB  - A & E Television Networks
KW  - Global warming
KW  - Climatic changes
KW  - History
KW  - Greenhouse effect, Atmospheric
KW  - Ice caps
KW  - Global temperature changes
N1  - Audiovisuals.
N2  - Arctic ice is melting, sea levels are rising and glaciers are shrinking at alarming rates. And the Earth is getting unmistakably warmer. But is this vast potentially catastrophic climate change the result of human behavior? Or is it simply the Earth's natural cycle of warming and cooling periods that have occurred since the planet formed? An in-depth study of the science behind this controversial hot-button issue. Scientists explore the skies to examine the warming effects of the sun and dig deep into the Earth to study continental movement and the volatile activity at the planet's core. Experts speculate on how natural events including volcanic eruptions and massive meteor impacts have affected temperatures and weather systems over the planet's 600-million-year history
ER  -